This is probably for our friends to the north. Do you know anything about the cultivars 'Balder,' Freja,' 'Loke,' 'Odin,' or 'Tyr?' They are cultivars of Ulmus xhollandica. Do you know anything about their use for bonsai?(Of course if you have a bonsai of Fraxinus excelsior, you could look under the roots.)Iris